Steel Dynamics Inc.'s Bold Upgrade of Galvanizing Line No. 1

摘要

Steel Dynamics Butler, Indiana plant knew they had to do something with Galvanizing Line #1 to ensure continued reliable operation. Computers. PLCs and I/O were 20 years old and obviously needed replacement. Not so obvious was what to do with the DC motors that still had useful life remaining. The solution was a Dual Purpose drive suitable for controlling both AC and DC motors while providing an upgrade path to all AC. AC-DC converters operating at unity PF relieved the plant of significant k VA loading with lower cost operation. This paper will review the successful upgrading of Galvanizing Line # I.